iGCSE Physics Electricity and Circuits

Complete the sentence: An ammeter is a device that measures

• voltage.

• charge.

• current.

• resistance.

Which is the unit of measure for current?

• amp

• volt

• coulomb

• joule

Which of the following materials is not a conductor?

• wire wool

• ionic solution

• steel

• plastic

Complete the following sentence: A current is defined as

• stationary electrons.

• the energy in a cell.

• a net flow of charge.

• electrons.

Which of the following statements about conventional current is correct?

• The electrons do not move.

• The electrons flow in all directions.

• Electrons flow from negative to positive.

• Electrons flow from positive to negative.

A voltmeter measures the voltage across a component. Where should it be positioned in a circuit in order to measure voltage correctly?

• in series with the component

• in parallel with the component

• over the cell

• anywhere in the circuit

Where would you place an ammeter in a series circuit to get a reading?

• next to the cell only

• in parallel with the component

• in parallel with the cell

• anywhere in the circuit

Which of the following represents the definition of an amp?

• Cs

• s/C

• C/s

• J/C

Which of the following represents the relationship between charge, current and time?

• Q = I × t

• Q = I/t

• Q = t/I

• Q = V × t

A kettle requires a current of 2.1 A and takes 3 minutes to boil a litre of water. Calculate the charge through the wire in this time?

• 6.3 C

• 378 C

• 0.7 C

• 6.3 Q